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Tugtupite

earth science Maturity 7-9 Next article →

Tugtupite is a very special mineral. It is used as a gemstone. This stone belongs to a group called silica-deficient feldspathoids. It is also part of the sodalite group. This means it shares a crystal structure with sodalite. Sometimes you can find both minerals in one sample.

This mineral forms in a specific way. It grows inside high alkali intrusive igneous rocks. The way it works involves many different parts. It is a beryllium aluminium tectosilicate. It also contains sodium and chlorine. Its chemical formula is Na4AlBeSi4O12Cl. This formula shows what makes it up.

People first found tugtupite in 1962. They found it in southwest Greenland. This place is called the Tugtup agtakôrfia Ilimaussaq intrusive complex. The name comes from the Greenlandic Inuit word tuttu. This word means reindeer. So the name tugtupite means reindeer blood.

Tugtupite comes in many bright colors. It can be white or pink. It can even be blue or green. Some pieces are a deep crimson. It looks like glass and can be clear or cloudy. It has a Mohs hardness of 4. Its specific gravity is 2.36. It also glows crimson under ultraviolet radiation.

You can find this mineral in a few places. It is in Quebec at Mont-Saint-Hilaire. It is also in the Lovozero Massif in Russia. In Nepal, it is in many rivers. These rivers go from Bardia to Dang. Only the Greenland deposits are gem-quality so far.

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